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Acknowledgements This work was supported by Natural Science Foundation of Shandong Province (Grant No.
ZR2010EL028), Jinan Science and Technology Department (Grant No. 20120110) and Science Foundation of Shandong Jiaotong University(Grant No.
Journal of Materials Processing Technology, 2003, 140 [5] T.
Journal of Materials Processing Technology, 2003,143-144 [6] L.J.
Application of Minimum Quantity Lubricant in Vibration Drilling: Mechanical Engineering Journal, 2009, (45)1 [7] H.L.

Experimental study on the milling of thin part of titanium alloy(TC4)[J].Journal of Materials Processing Technology,2003,138(1):489-493
[4] Hsin-Pao Chen, Hsin-Hung Kuo, Der-Min Tsay, Removing Tool Marks of Blade Surfaces by Smoothing Five-axis Point Milling Cutter Paths [J], Journal of Materials Processing Technology, 2009(209):5810-5817
Mechinical Science and Technology. 2004,23（3）:329-331
Journal of Nanjing University of Aeronautics & Astronautics, 2006，38（5）：639-343
Machining and Machinability of Materials, Vol. 12, No. 3, 2012, 266-279.

Electrochemical finishing (ECF), which is based on anodic electrochemical dissolution (ECD) process, appears to be very promising as a future finishing technique, since in many areas of applications it offers attractive advantages over traditional finishing processes such as its applicability regardless of material hardness, no cathode tool wear, smooth and bright surface, and a wide range of materials that can be finished.
Increasing contamination can cause deposition on surface of anode, so work-piece material no longer dissolves uniformly.
Malapati: International Journal of Machine Tools & Manufacture Vol.44 (2004), p.1577 [13] T.
McGeough: International Journal of Materials Processing Technology Vol.76 (1998), p.165 [15] Li Hongyou, Wang Hui and Zhang Zhitao: Journal of Dalian University of Technology Vol.43, No.4 (2003), p.452 [16] J.
Ruszaj: Journal of Materials processing Technology Vol.107, (2000), p.288

Usually the frequency range of explosive vibration signal is 5 ~ 300 Hz, but because of the small-scale test conditions, single detonator and stiff concrete material et al, all of that could result in short duration time and high frequency.
Acknowledgement Foundation item: National Natural Science Foundation (50774056; 51174147); Natural Science Fund of Hubei Province(2012FFA135).
Corresponding author: DongWang Zhong (1963-), male, Professor, Wuhan University of Science and Technology, doctoral tutor, E-mail: zhongdw123@263.net.
The first author: Li He (1986-), male, Wuhan University of Science and Technology PhD, E-mail: emp-heli@hotmail.com.
Journal of underground space and Engineering, 2006,2(3): 491-494.

International Journal of Clothing Science and Technology, 2022, 35(1): 32-47
IOP Conference Series: Materials Science and Engineering, 2019, 612(3)
Using phase change materials and air gaps in designing fire fighting suits: A mathematical investigation[J].
Thermal Science and Engineering Progress, 2023, 45
FIRE AND MATERIALS, 2002, (26): 121-126

Introduction With the development of science and technology, people has realized the optical properties more and more deeply.
In this paper, the theory of optical coherence has been studied , and its application is also studied in measurement science, such as, long distance stellar diameter and material movement speed are measured and calculated in astronomy, modern measurement technology on length and its tiny changes is monitored, industrial parts surface quality is detected, spectrum wavelength and material fine spectral is analyzed, the refractive index and concentration are measured in the chemical industry .
Journal of Xi'an Institute of mining and Technology (Natural Science Edition) [J], 1997, 2 (4): 439-442 [2] Shi Zhengyou.
Journal of Xi'an Institute of mining and Technology (Natural Science Edition) [J], 1997, 3 (17): 433-446 [3] Lin Qiang, Ye Xinghao.
Beijing: Science Press, 2010:442-445 [4] Li Junchang, Xiong Bingheng, et al.

Local surface alloying of metallic materials by laser is an issue of interest in the scientific world and materials engineering.
In case of large differences in the melting temperature of the materials the phenomenon of segregation of the alloying materials may occur in the laser melted pool, for example in case of CoCr alloying.
Farson, LIA Handbook of Laser Materials Processing, Laser Institute of America Magnolia Publishing Inc., 2001
Abdulwahab, Corrosion and Hardness Characteristics of Laser Surface Modified Ti6Al4V/Zr+TiC and Ti6Al4V/Ti+TiC Composites, International Journal of Electrochemical Science, 8 (2013) 2449-2458
Klimpel, Surface modification of the X40CrMoV5-1 steel by laser alloying and PVD coatings deposition, Journal of Achievements in Materials and Manufacturing Engineering, 27 (2008)

Ductile fracture criterion and material constants The material used in this study is sheet metal 2A12-0 with a thickness of 1.5 mm.
The simulations are base on the Hill's yield criterion which is suitable for normal anisotropy materials.
Materials perform a better plasticity under compressive stress state proved by many experiments, that's why the micro holes group up slowly with the smaller degree of stress triaxiality ( h / ), vice versa [9].
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Liu, Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors, Materials. 12 (2019) 1-9
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